基于新型瓦斯继电器挡板旋转角速度的重瓦斯报警新方法

目前实际工况中使用的瓦斯继电器重瓦斯动作流速整定值可靠性较低，仅能提供一定的参数范围作为参考。为提高重瓦斯报警的灵敏度，提出了一种基于瓦斯继电器挡板旋转角速度的重瓦斯报警方法。首先对瓦斯继电器挡板旋转角速度特性进行解析推导，并研制了一款实时输出挡板旋转角速度的智能瓦斯继电器和可以模拟不同重瓦斯故障能量大小的瓦斯继电器动特性实验平台。进而试验分析不同激励下的角速度特性关系，并依据试验结果，进行了一系列的仿真分析。由试验和仿真结果得到挡板旋转角速度整定值，通过判断挡板旋转角速度是否达到其整定值，及时进行重瓦斯报警，提高了重瓦斯报警的灵敏度，并为重瓦斯故障报警提供了新的整定方法。

A new method for heavy gas alarm based on rotational angular velocity of the baffle of a new gas relay

The current gas relay heavy gas action flow rate calibration values used in actual working conditions are lacking reliability and only provide a certain parameter range as a reference. Therefore, in order to improve the sensitivity of a heavy gas alarm, this paper proposes a method based on the angular velocity of a gas relay baffle rotation. First, it analyzes and derives the angular velocity characteristics of gas relay baffle rotation, and develops an intelligent gas relay with real time output of the rotational angular velocity of the baffle and a gas relay dynamic characteristic experimental platform. This can simulate different heavy gas fault energy magnitudes. Then it tests and analyzes the angular velocity characteristic relationship under different excitations. From the test results, a series of simulation analyses is carried out. The adjustment value of the baffle rotation angle speed is obtained from the test and simulation results. From judging whether the baffle rotation angle speed reaches its adjustment value, it gives a timely heavy gas alarm. This improves the sensitivity of the heavy gas alarm, and provides a new adjustment method for a heavy gas fault alarm. This work is supported by the National Natural Science Foundation of China (No. 51777075).